We at TED have had youth on the brain recently. TED2013 was themed “The Young. The Wise. The Undiscovered.” and we’re still riding the emotional high of the TEDYouth conference in New Orleans last month. At the same time, we’re working on an ongoing “Young Voices” series that profiles take-charge young people. So we were very excited to see several familiar faces among Time’s picks.

In order of age, these 30-under-30 champs are much-adored members of the TED community:

Jack Andraka, 16Andraka makes a good case for paying attention in high school biology class – that’s what he was doing when he got the idea for…